Process for obtaining solid mixtures of alkali-metal hypochlorite and alkali-metal chloride



Patented Feb. 2 5, 1930 UNITED STATES PATIENT OFFICE ALrn'EnorrE, or AACI-IEN, GERMANY PROCESS FOR OBTAINING SOLID MIXTURES or ALKALI-META HYPOCHLORITE AND ALKALI-METAL CHLORIDE g No Drawing. Application filed February 27, 1926,8eria1 No. 91,253,

' Hitherto alkali metal hypochlorite has been obtained technically only in dilute aqueous solutions either by treating alkali metalhydroxide or carbonate solutions with chlorine (Tas l7 7 or by electrolysis of alkali metal chlorides, or by double decomposition of hypochlorites of other metals and alkali metal salts.

Now, I have found that solid mixtures of alkali metal hypochlorite andalkali metal chloride may be obtained by spraying alkali hydroxide and treating this spray with chlorine gas. The resulting product is a moist mixture. This may be'dried by a current of dry air or any other indifferent gas which is led through the reaction space.

One mode of operation consists in spraym a lilghly concentrated aqueous solution of alkali metal hydroxide (e. g. NaOK) by means of chlorine gas through a sprinkler into an empty room. Another mode consists in blowing dust of solid alkali metal .hydroxide into a room containing chlorine gas.-

In order simultaneously to dry the moist products resulting in this way a sufficient amount of dry air or of any other. indifferent gas is led through the room in kler usedfor injecting or separately.

In order to prevent a rise of temperature and in Germany March 23,1925.

finely divided alkali metal hydroxide suspended in a gaseous drying .medlum to the ALFRED OPPE.

which the chemical reaction is taking place. This dry-. mg gas may enter either through the sprindangerous to the hypochlorite, the reacting chemicals, the drying gas, and suitable parts of the plant, or any of these, may be cooled,

in which case use may be made of the expansion of the originally compressed chlorine or drying gas. I claim:

1. Process of preparing a solid mixture of alkali metal hypochlorite and alkali metal chloride which comprises treating with chlorine gas afinely divided alkali metal hydroxide in the form of a mist.

2. Process of preparing adry solid mixture of alkali metal hypochlorite and alkali metal chloride which comprises subjecting a 

